A+B=6 A-B=2 Then A*B=????

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Gaurang Rathi

Make it simple - A + B = 6 A - B = 2 (Adding both the equations) 2A = 8 A = 4 , that implies B = 2 A*B = 4*2 = 8
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Experienced Online Maths and Science Tutor with 10+ Years of Experience in Private Tutoring

(a+b)²-(a-b)²=4ab 6² - 2² = 4ab 36-4=4ab 32=4ab Thus ab = 32/4 = 8 Simple !!
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Expert in Math & Science

A*B=8
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Math Magician

A+B+A-B=6+2=>8 2A=8 SO A=4 Similarly subtract both equation A+B-(A-B)=6-2; A+B-A+B=4, 2B=4 So B=2 ; Put A=4 and B=2 in A*B then we get 4*2=8 .
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Best Engineering Graphics & Drawing and Machine DrawingTeacher, Mechanical Workshop Technology and Basics of Mechanical Engineering

Gaurang' method is easier.
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Teacher

A*B=8, (A=4, B=2)
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Maths Home Tutor

A=4, B=2, so A*B=8
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Science Teacher

therefore A*B= 4X2=8
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